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This 16-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes.
The SN74LVC16T245 device is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the A-port outputs or place both output ports into the high-impedance mode. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports always is active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
SN74LVC16T245 | TSSOP (48) | 12.50 mm × 6.10 mm |
TVSOP (48) | 9.70 mm × 4.40 mm | |
SSOP (48) | 15.88 mm × 7.49 mm | |
BGA MICROSTAR JUNIOR (56) | 7.00 mm × 4.50 mm |
Changes from A Revision (October 2005) to B Revision
The SN74LVC16T245 control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by VCCA.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
The VCC isolation feature ensures that if either VCC input is at GND, then both ports are in the high-impedance state. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
PIN | I/O | DESCRIPTION | ||
---|---|---|---|---|
NAME | DGG / DGV | GQL / ZQL | ||
1A1 | 47 | B5 | I/O | Input/Output. Referenced to VCCA |
1A2 | 46 | B6 | I/O | Input/Output. Referenced to VCCA |
1A3 | 44 | C5 | I/O | Input/Output. Referenced to VCCA |
1A4 | 43 | C6 | I/O | Input/Output. Referenced to VCCA |
1A5 | 41 | D5 | I/O | Input/Output. Referenced to VCCA |
1A6 | 40 | D6 | I/O | Input/Output. Referenced to VCCA |
1A7 | 38 | E5 | I/O | Input/Output. Referenced to VCCA |
1A8 | 37 | E6 | I/O | Input/Output. Referenced to VCCA |
1B1 | 2 | B2 | I/O | Input/Output. Referenced to VCCB |
1B2 | 3 | B1 | I/O | Input/Output. Referenced to VCCB |
1B3 | 5 | C2 | I/O | Input/Output. Referenced to VCCB |
1B4 | 6 | C1 | I/O | Input/Output. Referenced to VCCB |
1B5 | 8 | D2 | I/O | Input/Output. Referenced to VCCB |
1B6 | 9 | D1 | I/O | Input/Output. Referenced to VCCB |
1B7 | 11 | E2 | I/O | Input/Output. Referenced to VCCB |
1B8 | 12 | E1 | I/O | Input/Output. Referenced to VCCB |
1DIR | 1 | A1 | I | Direction-control signal |
1OE | 48 | A6 | I | Tri-State output-mode enables. Pull OE high to place all outputs in Tri-State mode. Referenced to VCCA |
2A1 | 36 | F6 | I/O | Input/Output. Referenced to VCCA |
2A2 | 35 | F5 | I/O | Input/Output. Referenced to VCCA |
2A3 | 33 | G6 | I/O | Input/Output. Referenced to VCCA |
2A4 | 32 | G5 | I/O | Input/Output. Referenced to VCCA |
2A5 | 30 | H6 | I/O | Input/Output. Referenced to VCCA |
2A6 | 29 | H5 | I/O | Input/Output. Referenced to VCCA |
2A7 | 27 | J6 | I/O | Input/Output. Referenced to VCCA |
2A8 | 26 | J5 | I/O | Input/Output. Referenced to VCCA |
2B1 | 13 | F1 | I/O | Input/Output. Referenced to VCCB |
2B2 | 14 | F2 | I/O | Input/Output. Referenced to VCCB |
2B3 | 16 | G1 | I/O | Input/Output. Referenced to VCCB |
2B4 | 17 | G2 | I/O | Input/Output. Referenced to VCCB |
2B5 | 19 | H1 | I/O | Input/Output. Referenced to VCCB |
2B6 | 20 | H2 | I/O | Input/Output. Referenced to VCCB |
2B7 | 22 | J1 | I/O | Input/Output. Referenced to VCCB |
2B8 | 23 | J2 | I/O | Input/Output. Referenced to VCCB |
2DIR | 24 | K1 | I | Direction-control signal |
2OE | 25 | K6 | I | Tri-State output-mode enables. Pull OE high to place all outputs in Tri-State mode. Referenced to VCCA |
GND | 4 | B3 | — | Ground |
B4 | ||||
10 | D3 | |||
15 | D4 | |||
21 | G3 | |||
28 | G4 | |||
34 | J3 | |||
45 | J4 | |||
NC(1) | — | A2 | — | |
A3 | ||||
A4 | ||||
A5 | ||||
K2 | ||||
K3 | ||||
K4 | ||||
K5 | ||||
VCCA | 31 | C4 | — | A-port supply. 1.65 V ≤ VCCA≤ 5.5 V |
42 | H4 | |||
VCCB | 7 | C3 | — | B-port supply. 1.65 V ≤ VCCB≤ 5.5 V |
18 | H3 |
MIN | MAX | UNIT | |||
---|---|---|---|---|---|
VCCA
VCCB |
Supply voltage | –0.5 | 6.5 | V | |
VI | Input voltage(2) | I/O ports (A port) | –0.5 | 6.5 | V |
I/O ports (B port) | –0.5 | 6.5 | |||
Control inputs | –0.5 | 6.5 | |||
VO | Voltage applied to any output in the high-impedance or power-off state(2) |
A port | –0.5 | 6.5 | V |
B port | –0.5 | 6.5 | |||
VO | Voltage applied to any output in the high or low state(2)(3) | A port | –0.5 | VCCA + 0.5 | V |
B port | –0.5 | VCCB + 0.5 | |||
IIK | Input clamp current | VI < 0 | –50 | mA | |
IOK | Output clamp current | VO < 0 | –50 | mA | |
IO | Continuous output current | ±50 | mA | ||
Continuous current through each VCCA, VCCB, and GND | ±100 | mA | |||
TJ | Junction temperature | -40 | 150 | °C | |
Tstg | Storage temperature | –65 | 150 | °C |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±2000 | V |
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) | ±1000 | |||
Machine model (A115-A) | ±200 |
VCCI | VCCO | MIN | MAX | UNIT | |||
---|---|---|---|---|---|---|---|
VCCA | Supply voltage | 1.65 | 5.5 | V | |||
VCCB | 1.65 | 5.5 | |||||
VIH | High-level input voltage |
Data inputs(5) | 1.65 V to 1.95 V | VCCI × 0.65 | V | ||
2.3 V to 2.7 V | 1.7 | ||||||
3 V to 3.6 V | 2 | ||||||
4.5 V to 5.5 V | VCCI × 0.7 | ||||||
VIL | Low-level input voltage |
Data inputs(5) | 1.65 V to 1.95 V | VCCI × 0.35 | V | ||
2.3 V to 2.7 V | 0.7 | ||||||
3 V to 3.6 V | 0.8 | ||||||
4.5 V to 5.5 V | VCCI × 0.3 | ||||||
VIH | High-level input voltage |
Control inputs (referenced to VCCA)(6) |
1.65 V to 1.95 V | VCCA × 0.65 | V | ||
2.3 V to 2.7 V | 1.7 | ||||||
3 V to 3.6 V | 2 | ||||||
4.5 V to 5.5 V | VCCA × 0.7 | ||||||
VIL | Low-level input voltage |
Control inputs (referenced to VCCA)(6) |
1.65 V to 1.95 V | VCCA × 0.35 | V | ||
2.3 V to 2.7 V | 0.7 | ||||||
3 V to 3.6 V | 0.8 | ||||||
4.5 V to 5.5 V | VCCA × 0.3 | ||||||
VI | Input voltage | Control inputs | 0 | 5.5 | V | ||
VI/O | Input/output voltage | Active state | 0 | VCCO | V | ||
Tri-State | 0 | 5.5 | |||||
IOH | High-level output current | 1.65 V to 1.95 V | –4 | mA | |||
2.3 V to 2.7 V | –8 | ||||||
3 V to 3.6 V | –24 | ||||||
4.5 V to 5.5 V | –32 | ||||||
IOL | Low-level output current | 1.65 V to 1.95 V | 4 | mA | |||
2.3 V to 2.7 V | 8 | ||||||
3 V to 3.6 V | 24 | ||||||
4.5 V to 5.5 V | 32 | ||||||
Δt/Δv | Input transition rise or fall rate |
Data inputs | 1.65 V to 1.95 V | 20 | ns/V | ||
2.3 V to 2.7 V | 20 | ||||||
3 V to 3.6 V | 10 | ||||||
4.5 V to 5.5 V | 5 | ||||||
TA | Operating free-air temperature | –40 | 85 | °C |
THERMAL METRIC(1) | SN74LVC16T245 | UNIT | ||||
---|---|---|---|---|---|---|
DL (SSOP) | DGG (TSSOP) | DGV (TVSOP) | GQL / ZQL (BGA) | |||
48 PINS | 48 PINS | 48 PINS | 56 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 92.9 | 60 | 82.5 | 64.6 | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 29.5 | 13.9 | 34.2 | 16.6 | °C/W |
RθJB | Junction-to-board thermal resistance | 35.5 | 27.1 | 45.1 | 30.8 | °C/W |
ψJT | Junction-to-top characterization parameter | 8.1 | 0.5 | 2.7 | 0.9 | °C/W |
ψJB | Junction-to-board characterization parameter | 34.9 | 26.8 | 44.6 | 64.6 | °C/W |
PARAMETER | TEST CONDITIONS | VCCA | VCCB | TA = 25°C | TA = –40°C to 85°C | UNIT | |||||
---|---|---|---|---|---|---|---|---|---|---|---|
MIN | TYP | MAX | MIN | MAX | |||||||
VOH | IOH = –100 μA, | VI = VIH | 1.65 V to 4.5 V | 1.65 V to 4.5 V | VCCO – 0.1 | V | |||||
IOH = –4 mA, | VI = VIH | 1.65 V | 1.65 V | 1.2 | |||||||
IOH = –8 mA, | VI = VIH | 2.3 V | 2.3 V | 1.9 | |||||||
IOH = –24 mA, | VI = VIH | 3 V | 3 V | 2.4 | |||||||
IOH = –32 mA, | VI = VIH | 4.5 V | 4.5 V | 3.8 | |||||||
VOL | IOL = 100 μA, | VI = VIL | 1.65 V to 4.5 V | 1.65 V to 4.5 V | 0.1 | V | |||||
IOL = 4 mA, | VI = VIL | 1.65 V | 1.65 V | 0.45 | |||||||
IOL = 8 mA, | VI = VIL | 2.3 V | 2.3 V | 0.3 | |||||||
IOL = 24 mA, | VI = VIL | 3 V | 3 V | 0.55 | |||||||
IOL = 32 mA, | VI = VIL | 4.5 V | 4.5 V | 0.55 | |||||||
II | Control inputs | VI = VCCA or GND | 1.65 V to 5.5 V | 1.65 V to 5.5 V | ±1 | ±2 | μA | ||||
Ioff | A or B port |
VI or VO = 0 to 5.5 V | 0 V | 0 to 5.5 V | ±1 | ±2 | μA | ||||
0 to 5.5 V | 0 V | ±1 | ±2 | ||||||||
IOZ | A or B port |
VO = VCCO or GND, OE = VIH |
1.65 V to 5.5 V | 1.65 V to 5.5 V | ±1 | ±2 | μA | ||||
ICCA | VI = VCCI or GND, IO = 0 |
1.65 V to 5.5 V | 1.65 V to 5.5 V | 20 | μA | ||||||
5 V | 0 V | 20 | |||||||||
0 V | 5 V | –2 | |||||||||
ICCB | VI = VCCI or GND, IO = 0 |
1.65 V to 5.5 V | 1.65 V to 5.5 V | 20 | μA | ||||||
5 V | 0 V | –2 | |||||||||
0 V | 5 V | 20 | |||||||||
ICCA + ICCB | VI = VCCI or GND, IO = 0 |
1.65 V to 5.5 V | 1.65 V to 5.5 V | 30 | μA | ||||||
ΔICCA | A port | One A port at VCCA – 0.6 V, DIR at VCCA, B port = open |
3 V to 5.5 V | 3 V to 5.5 V | 50 | μA | |||||
DIR | DIR at VCCA – 0.6 V, B port = open, A port at VCCA or GND |
50 | |||||||||
ΔICCB | B port | One B port at VCCB – 0.6 V, DIR at GND, A port = open |
3 V to 5.5 V | 3 V to 5.5 V | 50 | μA | |||||
Ci | Control inputs |
VI = VCCA or GND | 3.3 V | 3.3 V | 4 | 5 | pF | ||||
Cio | A or B port |
VO = VCCA/B or GND | 3.3 V | 3.3 V | 8.5 | 10 | pF |
PARAMETER | FROM (INPUT) |
TO (OUTPUT) |
VCCB = 1.8 V ±0.15 V |
VCCB = 2.5 V ±0.2 V |
VCCB = 3.3 V ±0.3 V |
VCCB = 5 V ±0.5 V |
UNIT | ||||
---|---|---|---|---|---|---|---|---|---|---|---|
MIN | MAX | MIN | MAX | MIN | MAX | MIN | MAX | ||||
tPLH | A | B | 1.7 | 21.9 | 1.3 | 9.2 | 1 | 7.4 | 0.8 | 7.1 | ns |
tPHL | |||||||||||
tPLH | B | A | 0.9 | 23.8 | 0.8 | 23.6 | 0.7 | 23.4 | 0.7 | 23.4 | ns |
tPHL | |||||||||||
tPHZ | OE | A | 1.6 | 29.6 | 1.5 | 29.4 | 1.5 | 29.3 | 1.4 | 29.2 | ns |
tPLZ | |||||||||||
tPHZ | OE | B | 2.4 | 32.2 | 1.9 | 13.1 | 1.7 | 12 | 1.3 | 10.3 | ns |
tPLZ | |||||||||||
tPZH | OE | A | 0.4 | 24 | 0.4 | 23.8 | 0.4 | 23.7 | 0.4 | 23.7 | ns |
tPZL | |||||||||||
tPZH | OE | B | 1.8 | 32 | 1.6 | 16 | 1.2 | 12.6 | 0.9 | 10.8 | ns |
tPZL |
PARAMETER | FROM (INPUT) |
TO (OUTPUT) |
VCCB = 1.8 V ±0.15 V |
VCCB = 2.5 V ±0.2 V |
VCCB = 3.3 V ±0.3 V |
VCCB = 5 V 0.5 V |
UNIT | ||||
---|---|---|---|---|---|---|---|---|---|---|---|
MIN | MAX | MIN | MAX | MIN | MAX | MIN | MAX | ||||
tPLH | A | B | 1.6 | 21.4 | 1.2 | 9 | 0.8 | 6.2 | 0.6 | 4.8 | ns |
tPHL | |||||||||||
tPLH | B | A | 1.2 | 9.3 | 1 | 9.1 | 1 | 8.9 | 0.9 | 8.8 | ns |
tPHL | |||||||||||
tPHZ | OE | A | 1.4 | 9 | 1.4 | 9 | 1.4 | 9 | 1.4 | 9 | ns |
tPLZ | |||||||||||
tPHZ | OE | B | 2.3 | 29.6 | 1.8 | 11 | 1.7 | 9.3 | 0.9 | 6.9 | ns |
tPLZ | |||||||||||
tPZH | OE | A | 1 | 10.9 | 1 | 10.9 | 1 | 10.9 | 1 | 10.9 | ns |
tPZL | |||||||||||
tPZH | OE | B | 1.7 | 28.2 | 1.6 | 12.9 | 1.2 | 9.4 | 1 | 6.9 | ns |
tPZL |
PARAMETER | FROM (INPUT) |
TO (OUTPUT) |
VCCB = 1.8 V ±0.15 V |
VCCB = 2.5 V ±0.2 V |
VCCB = 3.3 V ±0.3 V |
VCCB = 5 V ±0.5 V |
UNIT | ||||
---|---|---|---|---|---|---|---|---|---|---|---|
MIN | MAX | MIN | MAX | MIN | MAX | MIN | MAX | ||||
tPLH | A | B | 1.5 | 21.2 | 1.1 | 8.8 | 0.8 | 6.1 | 0.5 | 4.4 | ns |
tPHL | |||||||||||
tPLH | B | A | 0.9 | 7.2 | 0.8 | 6.2 | 0.7 | 6.1 | 0.6 | 6 | ns |
tPHL | |||||||||||
tPHZ | OE | A | 1.6 | 8.2 | 1.6 | 8.2 | 1.6 | 6.2 | 1.6 | 8.2 | ns |
tPLZ | |||||||||||
tPHZ | OE | B | 2.1 | 29 | 1.7 | 10.3 | 1.5 | 8.6 | 0.8 | 6.3 | ns |
tPLZ | |||||||||||
tPZH | OE | A | 0.8 | 7.8 | 0.8 | 7.8 | 0.8 | 7.8 | 0.8 | 7.8 | ns |
tPZL | |||||||||||
tPZH | OE | B | 1.6 | 27.7 | 1.4 | 12.4 | 1.1 | 8.5 | 0.9 | 8.4 | ns |
tPZL |
PARAMETER | FROM (INPUT) |
TO (OUTPUT) |
VCC = 1.8 V ±0.15 V |
VCC = 2.5 V ±0.2 V |
VCC = 3.3 V ±0.3 V |
VCC = 5 V ±0.5 V |
UNIT | ||||
---|---|---|---|---|---|---|---|---|---|---|---|
MIN | MAX | MIN | MAX | MIN | MAX | MIN | MAX | ||||
tPLH | A | B | 1.6 | 21.4 | 1 | 8.8 | 0.7 | 6 | 0.4 | 4.2 | ns |
tPHL | |||||||||||
tPLH | B | A | 0.7 | 6.8 | 0.4 | 4.8 | 0.3 | 4.5 | 0.3 | 4.3 | ns |
tPHL | |||||||||||
tPHZ | OE | A | 0.3 | 5.4 | 0.3 | 5.4 | 0.3 | 5.4 | 0.3 | 6.4 | ns |
tPLZ | |||||||||||
tPHZ | OE | B | 2 | 28.7 | 1.6 | 9.7 | 1.4 | 8 | 0.7 | 5.7 | ns |
tPLZ | |||||||||||
tPZH | OE | A | 0.7 | 5.5 | 0.7 | 5.5 | 0.7 | 5.5 | 0.7 | 5.5 | ns |
tPZL | |||||||||||
tPZH | OE | B | 1.6 | 27.6 | 1.3 | 11.4 | 1 | 8.1 | 0.9 | 6 | ns |
tPZL |
PARAMETER | TEST CONDITIONS |
VCCA = VCCB = 1.8 V |
VCCA = VCCB = 2.5 V |
VCCA = VCCB = 3.3 V |
VCCA = VCCB = 5 V |
UNIT | |
---|---|---|---|---|---|---|---|
TYP | TYP | TYP | TYP | ||||
CpdA(1) | A-port input, B-port output | CL = 0, f = 10 MHz, tr = tf = 1 ns |
2 | 2 | 2 | 3 | pF |
B-port input, A-port output | 18 | 19 | 19 | 22 | |||
CpdB(1) | A-port input, B-port output | 18 | 19 | 20 | 22 | ||
B-port input, A-port output | 2 | 2 | 2 | 2 |